Abstract

Fishery resources are significantly depleted worldwide due to overfishing. Aquaculture, which is the farming of aquatic organisms such as fish, crustaceans, molluscs and aquatic plants, highly contributes to global fish supply. However, more ecologically sustainable management practices are needed. Fisheries and Aquaculture Journal would like to share new knowledge on emerging fields such as the biology, physiology, pathology and genetics of cultured organisms, especially new species, as well as on aqua cultural operations, i.e., nutrition, feeding and stocking practices, with the aim to improve the health and growth rates of cultured species. The second issue of volume 7 presents interesting articles related to these topics.

Description

Fishery resources are significantly depleted worldwide due to
overfishing. Aquaculture, which is the farming of aquatic organisms
such as fish, crustaceans, molluscs and aquatic plants, highly
contributes to global fish supply. However, more ecologically
sustainable management practices are needed. Fisheries and
Aquaculture Journal would like to share new knowledge on emerging
fields such as the biology, physiology, pathology and genetics of
cultured organisms, especially new species, as well as on aqua cultural
operations, i.e., nutrition, feeding and stocking practices, with the aim
to improve the health and growth rates of cultured species. The second
issue of volume 7 presents interesting articles related to these topics.

The development of an integrated plan for sustainable management
of fisheries resources is a priority. In this issue, Modou Thiaw, et al.
assessed the status of fisheries resources of Lake Iro, Chad, which can
serve as a model fisheries management regime in Central Africa. After
characterization of the exploited ichthyofauna and the location of
nursery and fishing areas, results indicated the negative effects of
fishing pressure on size structure of the fish resources. Therefore, in
order to promote sustainable and equitable exploitation of Lake Iro
resources, authors suggest the implement of a protected area at the lake
inlet to limit excessive juvenile fish catches, which disturbs the aquatic
food chain and prevents juvenile fish supply and growth. A similar
situation was reported in Turag River, Bangladesh, where Naser
Ahmed Bhouiyan, et al. after performing an inventory survey of
ichyofaunal diversity, fishing gear and craft, concluded that the
contribution of fisheries resources in Turag River is very limited for
livelihood of the surrounding people. The livelihood status of
fishermen at Noahkali districts in Bangladesh was also evaluated by
Jahangir Sarker Md, et al. which concluded that a subsidy as a means of nets, boats, fuels, engines etc., might be recommended for the better
livelihood of the fishermen. Interestingly, in this issue it is also showed
an in-season forecast model of return of chum salmon for the
population off the Honshu region in the Sea of Japan developed by
Kyuji Watanabe, using the smoothing spline based on previous catch
data.

In regard to the health and growth rates of cultured species,
Jianpeng Peng, et al. explored the biological action of somatolactin
(SL), the member of the growth hormone (GH)/prolactin (PRL) family
and fish-specific pituitary hormone, in tilapia hepatocytes, and
demonstrated for the first time that SL may serve as a novel regulator
in fish stimulating IGF1 and IGF gene expression. Also, with the
purpose of ameliorating the growth of abalone, from the study of
Magdalena Latuihamallo, et al. resulted that the natural food Ulva
fasciata provides better results on abalone growth due to the nutrients
contained in it, particularly the higher value of amino acids and fatty
acids compared to natural food Gracilaria lichenoides.

Another relevant topic in aquaculture is that relative to infections
and diseases of cultured species. In this issue, the results of a study
conducted by Sven M Bergmann, et al. on the Koi herpesvirus (KHV)
as a model member of the Alloherpesviridae, and rainbow trout as a
model salmonid host, infected with KHV, were reported. Finally,
Tombi Jeannette, et al. documented the model of occupation of the
transversal gradient of gill system of Oreochromis niloticus collected at
Melen Fish Station (Yaounde, Cameroon) by four Monogeneans
species, and provided explanations for the different patterns observed.

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